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Mainstream ZDNet 17 hours ago

I built a whole-home ad blocker with a $7 ESP32-S3 board - and it took just minutes

Tech 'ZDNET Recommends': What exactly does it mean? ZDNET's recommendations are based on many hours of testing, research, and comparison shopping. We gather data from the best available sources, including vendor and retailer listings as well as other relevant and independent reviews sites. And we pore over customer reviews to find out what matters to real people who already own and use the products and services we’re assessing. When you click through from our site to a retailer and buy a product or service, we may earn affiliate commissions. This helps support our work, but does not affect what we cover or how, and it does not affect the price you pay. Neither ZDNET nor the author are compensated for these independent reviews. Indeed, we follow strict guidelines that ensure our editorial content is never influenced by advertisers. ZDNET's editorial team writes on behalf of you, our reader. Our goal is to deliver the most accurate information and the most knowledgeable advice possible in order to help you make smarter buying decisions on tech gear and a wide array of products and services. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards. If we have made an error or published misleading information, we will correct or clarify the article. If you see inaccuracies in our content, please report the mistake via this form. Close I built a whole-home ad blocker with a $7 ESP32-S3 board - and it took just minutes Written -Hughes, Senior Contributing EditorSenior Contributing Editor June 28, 2026 at p. m. Just load existing code onto the ESP32-S3. Adrian Kingsley-Hughes/ZDNETFollow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways A cheap $7 board can turn its hand to ad blocking. It works as a DNS sinkhole, stripping out ads before download. Other options include using a Raspberry Pi and buying hardware. They say that necessity is the mother of invention, and the skyrocketing prices of Raspberry Pi boards have definitely been the kick in the pants that I've needed to look at cheaper, perhaps also better-suited, alternatives. I mean, the Pi is a great board, but for a lot of applications I've used it for over the almost 15 years that they've been around, it's also been overkill. The other day, I needed to put together an ad-block solution, not because I dislike ads, but simply because I was working with quite a limited bandwidth.

Original story by ZDNet View original source

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